27806 has 4 divisors (see below), whose sum is σ = 41712. Its totient is φ = 13902.

The previous prime is 27803. The next prime is 27809. The reversal of 27806 is 60872.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (27803) and next prime (27809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6950 + ... + 6953.

It is an arithmetic number, because the mean of its divisors is an integer number (10428).

2²⁷⁸⁰⁶ is an apocalyptic number.

27806 is a deficient number, since it is larger than the sum of its proper divisors (13906).

27806 is a wasteful number, since it uses less digits than its factorization.

27806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13905.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 27806 is about 166.7513118389. The cubic root of 27806 is about 30.2955963785.

The spelling of 27806 in words is "twenty-seven thousand, eight hundred six".